We found 5 dictionaries that define the word eider ducks:

General (4 matching dictionaries)

1. eider ducks: Collins English Dictionary
2. eider ducks: Vocabulary.com
3. eider-ducks: Wordnik
4. eider ducks: TheFreeDictionary.com

Computing (1 matching dictionary)

5. eider ducks: Encyclopedia

(Note: See eider_duck as well.)

Definitions from Wiktionary (eider duck) ▸ noun:  Synonym of eider (“duck”) ▸ Also see eider_duck ▸ Words similar to eider ducks ▸ Usage examples for eider ducks ▸ Idioms related to eider ducks ▸ Wikipedia articles (New!) ▸ Words that often appear near eider ducks ▸ Rhymes of eider ducks ▸ Invented words related to eider ducks